Infiniti's flagship is among our top-rated luxury sedans. Handling is agile and the interior is nicely finished. Performance is strong, and fuel economy has improved, even with the power increase. But the engine can sound a bit raspy when revved high. A wide variety of electronic safety technologies is available, though the features range from useful to simply annoying.
Alerts
There are 5 recalls on this vehicle. Learn More.

Road Test Results

Performance
Acceleration Acceleration Acceleration tests are conducted on a smooth, flat pavement straightaway at the track. Time, speed, and distance measurements are taken with a precise GPS-based device that’s hooked to a data-logging computer.
0 to 60 mph 0 to 60 mph (sec.) The time in seconds that a vehicle takes to reach 60 mph from a standstill with the engine idling.
Transmission Transmission Transmission performance is determined by shifting smoothness, response, shifter action, and clutch actuation for manual transmissions.
Fuel Economy Fuel Economy We perform our own fuel-economy tests, independent of the government's often-quoted EPA figures and the manufacturers' claims. Using a precise fuel-flow measuring device spliced into the fuel line, we run two separate circuits to represent city and highway consumption.
CR's Overall Mileage CR's Overall Mileage CR's overall mileage is a composite of measured fuel usage on a prescribed city course and highway cruising; and CR's 150-mile test trip of mixed driving, if tested. In recent road tests, we've discontinued the 150-mile trip test.
CR's City Mileage CR's City Mileage Measured fuel usage on a prescribed city course.
CR's Highway Mileage CR's Highway Mileage Measured fuel usage on a prescribed highway cruising.
Annual Fuel Cost Annual Fuel Cost The cost and amount of fuel used in 12,000 miles and is calculated from CR's overall mileage.
Braking Braking The braking rating is a composite of wet and dry stopping distances and pedal feel. Braking distance is from 60 mph, with no wheels locked.
Emergency Handling Emergency Handling Several factors go into the rating, including the avoidance maneuver speed and confidence, as well as how the vehicle behaves when pushed to its limit.
Comfort / Convenience
Ride Ride Our expert judgment of how well the suspension isolates and absorbs road imperfections and how steady it keeps the body on various road surfaces.
Noise Noise Our expert judgment of the vehicle's interior noise level in everyday driving.
Front Seat Comfort Front Seat Comfort Our judgment of how comfortable the front seat is for drivers of various heights.
Rear Seat Comfort Rear Seat Comfort Our judgment of how comfortable the rear seat is for two passengers to sit across.
Interior Fit and Finish Interior Fit and Finish An expert evaluation of the interior quality and craftsmanship.
Trunk/Cargo Area Trunk/Cargo Area Our rating is based on the amount of luggage or cargo space that a vehicle has in the trunk or cargo area.
Emissions
Greenhouse Gas Greenhouse Gas The Greenhouse Gas Rating represents the amount of carbon dioxide the vehicle emits compared to other vehicles of the same model year. This score from the EPA ranges from 1 (worst) to 10 (best).
NA
Smog Rating Smog Rating The Smog Rating represents the amount of health-damaging and smog-forming airborne pollutants the vehicle emits compared to other vehicles of the same model year. This score from the EPA ranges from 1 (worst) to 10 (best).
NA

Owner Reports

Worse Better
Reliability History Reliability History The reliability charts are based on responses on hundreds of thousands of vehicles from our latest Annual Auto Survey. Consumer Reports subscribers reported on any serious problems they had with their vehicles during the past 12 months that they considered serious because of cost, failure, safety, or downtime, in any of the trouble spots included in the table below. The results are presented relative to the average model that year. Extra weight is given to the more serious areas such as major engine or transmission problems. Based on this data and further analysis, we predict reliability for the latest year. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
2000
2001
2002
2003
NA
2004
NA
2005
NA
2006
2007
2008
NA
2009
NA
2010
NA
2011
2012
2013
NA
2014
2015
2016
2017
2018
2019
2020
Reliability Trouble Spots
Engine Major Engine Major Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.
NA
Engine Minor Engine Minor Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.
NA
Engine Cooling Engine Cooling Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.
NA
Transmission Major Transmission Major Transmission rebuild or replacement, torque converter, clutch replacement.
NA
Transmission Minor Transmission Minor Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.
NA
Drive System Drive System Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.
NA
Owner Satisfaction Owner Satisfaction To learn about satisfaction, CR has collected survey data from our annual survey on more than half a million vehicles. Our subscribers provide great insights into their satisfaction by answering one simple question: If they had it to do all over again, would they definitely buy or lease the same model? In addition, respondents also rate their cars in six categories: driving experience, comfort, value, styling, audio, and climate systems. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
2000
2001
2002
2003
NA
2004
NA
2005
NA
2006
2007
2008
2009
NA
2010
NA
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
Driving Experience Driving Experience Includes acceleration and handling
Comfort Comfort Includes seats, climate control, noise, and ride
Value Value Did you get what you wanted relative to the price you paid?
Styling Styling How it looks inside and out
Safety Equipment
ABS and ESC standard. Side and head protection air bags standard.
Road Test

Infiniti's flagship is among our top-rated luxury sedans. Handling is agile and the interior is nicely finished. Performance is strong, and fuel economy has improved, even with the power increase. But the engine can sound a bit raspy when revved high. A wide variety of electronic safety technologies is available, though the features range from useful to simply annoying. Controls are daunting at first, but experience brings familiarity.

The hybrid model gets better fuel economy than the non-hybrid version -- and on par with some small cars -- but the hybrid system tends to be jerky and abrupt transitioning in and out of electric power. With more power, the hybrid also has quicker acceleration than the conventional version, but diminished handling and braking.

Seating
2 front, 3 rear
Drive Wheels
AWD , Rear
Warranty
Coverage varies among versions of this vehicle

In most cases, automotive warranties are based on the vehicle identification number (VIN), and the warranty will be valid regardless of ownership. The dealership can tell you exactly how much warranty is left.

Read more about extended warranties
Body Styles
sedan
Transmissions Available
  • 7-speed Automatic
Engines Available
  • 3.5-liter V6 hybrid (360 hp)
  • 3.7-liter V6 (330 hp)
  • 5.6-liter V8 (420 hp)

Owner Reported Trouble Spots

The Reliability score is based on our latest subscriber survey of 2012 Infiniti M owners. The owner comments describe problems respondents experienced with this vehicle.

Climate System

Blower (fan) motor, A/C compressor, condenser, evaporator, heater system, automatic climate control, refrigerant leakage, electrical failure.

What Owners Say

Evaporator

"A/C not cooling, required replacement of evaporator coil. Replacement took several days. Loaner car was provided by the dealer during this period"

Anonymous, TX (2012 Infiniti M M37 3.7-L V6)
Heated or cooled seat controls

"The electrical heating in the drivers seat failed and it was a $1,200 repair bill. Ouch !!!!"

R R., AB (2012 Infiniti M M37 X 3.7-L V6)

"heated/cooled seat on driver side not working"

Mark H., NJ (2012 Infiniti M)
Heater system

"There was no heat being generated by the system, even when cranked up to 85 deg. The system was still under warranty and had to be replaced, though I feel the heat output is still inadequate (it's hard to tell because it's spring and the demands are"

Alma B., IL (2012 Infiniti M M35h 3.5-L V6 hybrid)

"Heater core had to be replaced.And the climate control sensor had to be replaced"

Anonymous, CA (2012 Infiniti M M37 3.7-L V6)

"Passenger heater box failed. The replacement process left the dashboard with terrible rattles"

Anonymous, CT (2012 Infiniti M M37 X 3.7-L V6)

"Passenger side heater coil requires replacement"

John M., TN (2012 Infiniti M M37 3.7-L V6)

"Blockage in ducts. Passenger side does not get heat."

Anonymous, GA (2012 Infiniti M M37 3.7-L V6)

"HEATER SYSTEM REQUIRED 3 DAYS AT THE DEALER AND A $2,500.00 REPLACEMENT"

Thomas M., PA (2012 Infiniti M M37 X 3.7-L V6)

"The heater coil for the front passenger side failed and the cost to repair was over $2,600 and took 2 days in the shop since the entire dash had to be removed. The Nissan dealer stated that there was a manufacturers bulletin issued on this problem. I suspect the cost prevented Infiniti from issuing a recall notice. A friend who has the same vehicle experienced the same identical heater problem in the last year as well"

R R., AB (2012 Infiniti M M37 X 3.7-L V6)

"The passenger side heater core failed for the second time since we purchased the vehicle in 2012. Although the vehicle was off warranty, I was told the dealership had never had two failed heater cores on the same vehicle. Infiniti paid for the part and I paid the labor."

Russell A., AB (2012 Infiniti M M37 X 3.7-L V6)

"Even when set at max heat setting, cold air coming out the driver's side vents and only slightly warm air in the passenger side"

Anonymous, IL (2012 Infiniti M M35h 3.5-L V6 hybrid)

"Only the driver side heating worked. Infiniti was aware that this was a design/manufacturing problem that affected majority of these vehicles but failed to accept responsibility for this problem."

Anonymous, (2012 Infiniti M M37 X 3.7-L V6)

"No heat on passenger side"

James W., MO (2012 Infiniti M M37 X 3.7-L V6)

"No heat in a cold, Canadian winter.Unable to fix, x 4 attempt..Now told parts available locally, nationally or internationally"

Anonymous, ON (2012 Infiniti M M35h 3.5-L V6 hybrid)

"Passenger side heater coil blocked---estimated repair $2,000. Did not have it repaired."

John M., TN (2012 Infiniti M M37 3.7-L V6)

"PASSENGER SIDE DOES NOT RECEIVE HEAT THROUGH ITS VENTS"

Anonymous, GA (2012 Infiniti M M37 3.7-L V6)

Body Integrity

Squeaks, rattles, wind noises, loose or cracked seals and/or weather-stripping, air and water leaks.

What Owners Say

Squeaks or rattles

"Had a squeak in front of the dash board near the windshield left of center on the dash. Had to take it back to the dealership twice to resolve the issue"

Anonymous, NJ (2012 Infiniti M M37 X 3.7-L V6)

"There was a squeak in the windshield area that the dealer corrected. The dealership did not charge us to correct that problem"

Anonymous, NM (2012 Infiniti M M37 X 3.7-L V6)

"Continuous ticking sound from the dashboard"

Imad R., TX (2012 Infiniti M M37 3.7-L V6)

"Rattle in console area. Very annoying. Do not live near dealer but hope to get it fixed before certified warranty expires"

Anonymous, PA (2012 Infiniti M M37 X 3.7-L V6)

"Two console pieces had to be fixed due to rattles"

Anonymous, OH (2012 Infiniti M M37 X 3.7-L V6)

"In the colder weather there is a rattle in the roof near the front window on the driver's side which comes and goes"

I L., MD (2012 Infiniti M M56 X 5.6-L V8)

"intense squeaks and rattles around windows in cool weather-dealer acknowledged problem but unable to successfully repair problem of molding , noise around windshield"

Anonymous, CT (2012 Infiniti M M37 X 3.7-L V6)

"I will NEVER purchase another infiniti! The rattles can't be fixed!!!"

Martin N., CA (2012 Infiniti M M37 3.7-L V6)

"The electronic tilt & telescopic steering mechanism failed. Unit replaced under warranty"

Indrajit C., NJ (2012 Infiniti M M37 X 3.7-L V6)
Wind noise

"This car has louder wind noise than my old car, a BMW"

I L., MD (2012 Infiniti M M56 X 5.6-L V8)

Brakes

Antilock system (ABS), parking brake, master cylinder, calipers, rotors, pulsation or vibration, squeaking, brake failure or wear.

What Owners Say

Normal routine brake wear

"Needed rear brakes after 12000 miles/ I was told that was normal for the M. I am not hard on the brakes. was not happy"

Anonymous, NJ (2012 Infiniti M M37 X 3.7-L V6)

"Brake linings require more frequent replacement than I would like (25,000 miles)"

Anonymous, CA (2012 Infiniti M M37 3.7-L V6)

"Drove 40,000 needed to replace break pads and rotors"

Anonymous, NJ (2012 Infiniti M M37 X 3.7-L V6)
Premature brake wear

"the rear brake pads worn down"

R C., NY (2012 Infiniti M M37 X 3.7-L V6)

"Rear brakes wore out after 24,000 KM . Fronts had 50% wear"

Anonymous, ON (2012 Infiniti M M56 X 5.6-L V8)

"Took several visits to dealer to accept responsibility that the terrible squeaking was due to premature break wear. After arguing our case up the ladder, they finally agreed to fix the issue at their expense"

Anonymous, FL (2012 Infiniti M M37 3.7-L V6)
Rotors

"All four rotors warped by 29,000 miles No other problems"

Anonymous, AL (2012 Infiniti M M37 3.7-L V6)

"Rotors are thin and as such, when the tire rotation resulted in the lug nuts not being properly torqued, there was warping of the rotors and replacement was necessary."

David P., TN (2012 Infiniti M M37 X 3.7-L V6)

Suspension

Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.

What Owners Say

Electronic or air suspension

"When I turned off the car the steering wheel goes up to allow ease of getting out. My steering wheel stuck in the up position making it very hard to turn the steering wheel. Dealer repaired at no cost to me"

Greg L., GA (2012 Infiniti M M37 3.7-L V6)
Power steering leaks

"cavitation noise"

James W., MO (2012 Infiniti M M37 X 3.7-L V6)

"Leaked to point power steering became unresponsive. Refilled with sealer but still leaks. Estimates to fix over $2k."

Anonymous, WI (2012 Infiniti M M37 X 3.7-L V6)
Power steering pumps and hoses

"a whining noise led to replacement of faulty power steering pump"

Anonymous, CT (2012 Infiniti M M37 X 3.7-L V6)
Steering linkage (includes rack and pinion)

"was from the bad pot holes in montreal"

Anonymous, QC (2012 Infiniti M M37 X 3.7-L V6)

"Leaks at rack. Now making unsettling noises even after filling fluid"

Anonymous, WI (2012 Infiniti M M37 X 3.7-L V6)

"Steering wheel totally locked up. Motor in the tilt system had malfunctioned."

James W., MO (2012 Infiniti M M37 X 3.7-L V6)

Electric System

Alternator, starter, hybrid battery and related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, distributor or rotor failure, spark plugs and wires failure.

What Owners Say

Exterior lights (other than headlights)

"Fog Light failed for the 2nd time-expensive, $450, to replace"

Frank L., CA (2012 Infiniti M M37 3.7-L V6)

"driver's side power mirror failed, motor died"

Anonymous, (2012 Infiniti M M56 5.6-L V8)
Heated or cooled seats

"Driver seat cooling stopped"

Anonymous, VA (2012 Infiniti M M37 3.7-L V6)

"multiple trips to dealer to fix heated/ AC seats , unable to fix/ parts not available , etc"

Anonymous, ON (2012 Infiniti M M35h 3.5-L V6 hybrid)

"Heated driver seat stopped working and had to be replaced"

Dean C., IL (2012 Infiniti M M37 X 3.7-L V6)
Warning lights

"Check engine light flashing (no apparent reason). This indicates liquid fuel is getting to catalytic converter. was advised not to drive car when this light flashes"

Anonymous, FL (2012 Infiniti M M56 X 5.6-L V8)
Wiper motor or washer

"Rain sensor was not working correctly"

Anonymous, OH (2012 Infiniti M M37 X 3.7-L V6)

In-car Electronics

CD or DVD players, radio, speakers, GPS, communication system (e.g., OnStar), display screen freezes or goes blank, phone pairing (e.g. Bluetooth), voice control commands, steering wheel controls, portable music device interface (e.g., iPod/MP3 player), backup or other camera/sensors.

What Owners Say

Backup or other camera/sensors

"Camera failed at about 95,000 miles. Replacement cost $1,300"

Anonymous, VA (2012 Infiniti M M37 X 3.7-L V6)
Phone pairing (e.g., Bluetooth)

"Bluetooth pairing is not working great. Iphone bluetooth connection doesn't consistently work"

John J., CA (2012 Infiniti M M37 3.7-L V6)

"Drops pairing regularly and will not reconnect without restarting vehicle"

Anonymous, VA (2012 Infiniti M M37 X 3.7-L V6)

"Two problems: The phone rarely pairs at start, and after it does pair it sometimes sounds choppy"

Anonymous, TX (2012 Infiniti M M37 3.7-L V6)

"Phone no longer links to incoming calls. Outgoing is fine"

James W., MO (2012 Infiniti M M37 X 3.7-L V6)
Radio

"Antenna works intermittently; started just after warranty expired. Quote to fix was extremely high due to having to retire through roof. Chose not to fix and will be unhappy with this until after we sell the car."

Anonymous, FL (2012 Infiniti M M37 3.7-L V6)

Fuel System

Check engine light, sensors (includes O2 or oxygen sensor), emission control devices (includes EGR), engine computer, engine computer, fuel cap, fuel gauge/sender, fuel injection system, fuel pump, fuel leaks, stalling or hesitation.

What Owners Say

Emission control devices (includes EGR)

"Not familiar with the problem. Check engine soon light went on and off a couple of times, so had a diagnostic done and problem was fixed under warranty"

Anonymous, WA (2012 Infiniti M M37 X 3.7-L V6)
Fuel pump

"a filter of some sort got clogged. had great trouble getting it to start. cost about $300 at dealer to get fixed. think that was a rip off. but this the only problem i've ever had with this car. best i've ever owened and i've had lots of cars. never kept a car this long and plan to keep it a lot longer"

Anonymous, PA (2012 Infiniti M M37 X 3.7-L V6)
Sensors (includes O2 or oxygen sensor)

"Sensor came on when there was no problem found."

Anonymous, CA (2012 Infiniti M M37 3.7-L V6)

"Engine check light continued to come on after replacing sensor. Finally got it fixed."

Anonymous, CA (2012 Infiniti M M37 3.7-L V6)

Engine Minor

Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.

What Owners Say

Engine computer

"Engine doesn't always kick in when power needed. Sometimes there's a significant delay in getting immediate power"

John J., CA (2012 Infiniti M M37 3.7-L V6)
Oil leaks

"Valve cover was leaking. Dealership noticed it when I brought the car in for oil change. The valve cover was replaced under warranty."

Clinton C., CO (2012 Infiniti M M37 X 3.7-L V6)

"seeping valve cover gasket"

Anonymous, TX (2012 Infiniti M M37 3.7-L V6)

Transmission Minor

Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.

What Owners Say

Rough shifting

"At low speeds when you give the car gas is goes from struggling to a passing grear with too much power. Had Infiniti check it and the downloaded an update to the cars computer. There was no difference in performance. I will be bringing it in again"

Anonymous, NJ (2012 Infiniti M M37 X 3.7-L V6)
Transmission computer

"Transmission computer program is poor. Gear selection does not suit driving conditions. Car slides into a much higher gear than necessary, making acceleration and hill climbing tedious"

Paul G., ON (2012 Infiniti M M37 X 3.7-L V6)

Engine Major

Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.

What Owners Say

Head gasket

"During routine maintenance technician found oil leak from the head gasket. Gasket was repaired under warranty"

Anonymous, CO (2012 Infiniti M M37 X 3.7-L V6)
Timing belt or chain

"The was actually a recall for a potential catastrophic failure. Cost me nothing and a loaner was provided"

Anonymous, IL (2012 Infiniti M M56 X 5.6-L V8)

Body Hardware

Power or manual windows, locks and latches, tailgate, hatch or trunk, doors or sliding doors, mirrors, seat controls, safety belts, sunroof, convertible top.

What Owners Say

Windows

"All windows roll down and doors unlocked by themselves - at random. Took three weeks and $2,500 for dealer to correct problem. Car was 5000km beyond warranty. I'm not impressed"

Anonymous, ON (2012 Infiniti M M37 X 3.7-L V6)

Paint/Trim

Paint (fading, chalking, cracking, or peeling), loose interior and exterior trim or moldings, rust.

What Owners Say

Paint (fading, chalking, cracking, or peeling)

"Clear coat pealing in three locations"

Anonymous, TN (2012 Infiniti M M37 3.7-L V6)

Power Equipment

Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, remote engine start, alarm or security system

What Owners Say

Battery (not hybrid or electric)

"Car goes to the dealer exactly per the manual, yet at less than 4 years and 26000 miles, the battery. Due to my considerable unhappiness, the dealer warranted the battery"

Anonymous, IL (2012 Infiniti M M56 X 5.6-L V8)

Drive System

Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.

Engine Cooling

Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.

Exhaust

Muffler, pipes, catalytic converter, exhaust manifold, leaks.

Change Vehicle